Super secure. Super simple. SuperClamp. The Saris Freedom SuperClamp 4-bike hitch rack makes transporting your bikes a snap. Their industry-first front and rear wheel hooks completely eliminate frame contact to keep your pride and joy in pristine condition while at the same time providing the most secure hold of any tray-style rack out there. The arms ratchet into place to simplify loading and unloading and work with any bike up to a 47" wheelbase. There's a two-pronged security feature comprised of rack-integrated cable locks plus a locking pin in the hitch to protect both the bikes and rack while access to the rear of the vehicle is readily available via the rack's tilting feature.